I have a silly, but suddenly very important question to ask: has anyone ever sent a thumb drive in the U.S. Mail to someone several states away? I shot a large number of photos using my SLR on a recent historic trip for members of my home town, and I saved the photos as both JPEGs and DNGs (a high-quality uncompressed file format). The DNGs are way too large to e-mail. I was thinking about sending them via snail mail. This begs questions: (1: how do I package a thumb drive for the mail so it arrives unharmed, and (2: what kind of packages will work for that specific kind of tiny shape?